四川康定县野牛沟灾害性泥石流汇流特征  

Conflux feature analysis of Yeniu Ravine disastrous debris flow in Kangding County,Sichuan Province

作　　者：王东辉[1] 梁波[2] 白永健[1] 

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081 [2]四川省地质工程勘察院,四川成都610072

出　　处：《中国地质灾害与防治学报》2011年第2期50-54,共5页The Chinese Journal of Geological Hazard and Control

基　　金：国土资源大调查项目:甘孜地区(康定县)地质灾害详细调查(1212010814020)

摘　　要：2005年7月7日,康定县野牛沟发生泥石流,堵塞大渡河一级支流金汤河,造成了巨大的经济损失。研究发现,野牛沟泥石流为五十年一遇粘性低频泥石流,具有流速快,沿程流量剧增的特点。分析认为,由于鸡索子沟、纸厂沟巨大的洪峰流量汇入主沟,再加上流通区内2km范围内密集分布了大量的不稳定物源,这些物源短距离内大量汇入主沟,最终导致泥石流峰值流量在流通区的后半程剧增。A debris flow occurs in Yeniu Ravine of KangDing on July 7, 2005, made great losses. Jintang River has been blocked which is a branch of Dadu River. There are three major features of the Yeniu Ravine debris flow. Firstly, it is a low frequency and high viscous debris flow with a 50year round. Secondly, it has very quick speed. Thirdly, the discharge has a suddenly increase along the process of the debris flow. The peak flow of Jisuozi Ravine and ZHichang Ravine, and the unstable sources in circulation area enter into Yeniu Ravine in a small region, that made the discharge a suddenly increase in the last part of circulation area.

关 键 词：康定 金汤河 泥石流 流量 流速 

分 类 号：P642.23[天文地球—工程地质学]